Gunmen attacked a mosque in Quebec City, Canada, late Sunday, killing six people and wounding eight others.
A police spokeswoman said two suspects have been arrested, but did not give additional information about their identities or motive.
The head of the Quebec Islamic Cultural Center said people were gathered for evening prayers at the time of the shooting. Fifty-three people were there, according to police.
Prime Minister Justin Trudeau condemned the shooting as a "terrorist attack on Muslims," and stressed in a statement that his country values diversity and religious tolerance.
"Muslim-Canadians are an important part of our national fabric, and these senseless acts have no place in our communities, cities and country," Trudeau said.
In June 2016, a pig's head was left on the doorstep of the same mosque.
After Sunday's shooting, New York Mayor Bill De Blasio said his police department was providing extra protection for mosques in the city.
"To my fellow New Yorkers who are Muslim: New York City will protect you. The NYPD will protect you. We will fight all hatred and bias," he wrote on Twitter.